JP2015100770A - Water purifier - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water purifier to/from which a cartridge for water purifiers can be attached/detached easily and surely without increasing one member, that is used for attaching/detaching the cartridge for water purifiers to/from a water purifier body, to raise a production cost thereof, and without wasting the labor and time to turn the cartridge having large rotational resistance two or three times, which can allow a kind of the cartridge in use to be confirmed when spares thereof are purchased, which hardly falls off even when hit possibly by a pan, and which is never broken even when used for a long period of time in such a district that the hydraulic pressure is specially high.SOLUTION: The water purifier comprises: the water purifier body having a raw water supply part; and the cartridge for water purifiers, the cartridge connected to the water purifier body and having a raw water reception part and a purified water discharge part. The raw water supply part has a raw water supply port, a male screw for connection, and a ring-shaped sealing member. The raw water reception part has a circular hole-shaped raw water reception port and a female screw for connection. Each of the male screw for connection and the female screw for connection comprises a double-threaded screw. The purified water discharge part is disposed at the position different from that of the raw water reception part.

Description

  The present invention relates to a water purifier for purifying tap water, and more particularly to a water purifier in which a water purifier cartridge is attached to and detached from a water purifier main body.

  Conventionally, as a water purifier for purifying tap water, a faucet directly connected water purifier directly connected to a discharge port of a tap tap, a stationary water purifier used by being placed on a sink, and the like are known. Both are provided with a switching valve for switching between a flow path for filtering tap water and a flow path for discharging tap water without filtering, and a removable water purifier cartridge is attached to the flow path for filtering tap water. Since the total amount of filtered water that can be processed by the filter medium filled in the water purifier cartridge is limited, select a flow path with the water purifier cartridge attached only when you want to obtain purified water, such as for drinking, and when pumping water into the bucket. By selecting a channel for discharging tap water, the water purifier cartridge can be used for a long time.

  As a method for attaching and detaching the water purifier cartridge, for example, as in Patent Document 1, the raw water inlet of the water purifier cartridge (the raw water inlet 22a in Patent Document 1) is used as the raw water supply port of the water purifier main body (in Patent Document 1, the raw water outlet). After connecting to 7a), there is a method in which a cap, which is a separate member, is put on the water purifier cartridge and fitted into the casing (in the patent document 1, the upper case 3 and the lower case 2). However, there is a problem that it takes time to rotate the screw of the cap 2-3 times. In addition, since one member is added to attach and detach the water purifier cartridge, there is a problem that the manufacturing cost increases. Further, since the water purifier cartridge is not visible from the outside, there is a problem that the type cannot be confirmed even if it is attempted to purchase a spare part.

  On the other hand, for example, as disclosed in Patent Document 2, if a spiral male screw is provided in the water purifier main body and a spiral female screw is provided in the water purifier cartridge, and the screw is engaged and fixed, one member is used for fixing. There is no need to increase. The type of cartridge in use can be confirmed when purchasing spare parts. However, since the connecting portion has a double-pipe structure, the spiral screw has a large diameter, there are a plurality of O-rings for sealing, and since the diameter is large, the rotational resistance is large and it is difficult to rotate. Moreover, since it is rotated 2 to 3 times, the problem that it takes time is not solved.

  On the other hand, Patent Document 3 proposes a method of connecting a water purifier main body (a body in Patent Document 3) and a water purifier cartridge by a bayonet mechanism. As a first step, the water purifier cartridge is leveled, its raw water inlet is inserted into the raw water supply port of the water purifier body, and as the second step, it is rotated 90 degrees clockwise. Only in these two steps, the water purifier cartridge can be attached to the water purifier main body, and there is no need to rotate the cap or the water purifier cartridge many times. There is no need to add one member to fix the water purifier cartridge. The type of cartridge in use can be confirmed when purchasing spare parts. However, in the unlikely event that a frying pan is hit, it turns 90 degrees and falls off, and there is a problem that tap water may spout, especially if water is running. Since the catch of the bayonet mechanism is reduced when downsizing, the bayonet mechanism may be damaged when used for a long time in an area where water pressure is particularly high.

JP-A-7-284761 JP 2000-189951 A Japanese Patent No. 3303499

  In view of the above-mentioned problems in the prior art, the present invention does not increase the manufacturing cost by adding one member to the water purifier main body to attach or detach the water purifier cartridge, and it is troublesome to turn the water purifier cartridge two or three times. It doesn't take up and rotation resistance is not large, you can check the type of cartridge in use when purchasing spare parts, it will not fall out even if you hit a frying pan, and it will be used for a long time in areas with particularly high water pressure It is an object of the present invention to provide a water purifier in which a water purifier cartridge can be easily and reliably attached and detached without being damaged.

  In order to achieve the above object, a water purifier of the present invention is a water purifier comprising a water purifier main body having a raw water supply section, a water purifier cartridge connected to the water purifier main body, and having a raw water receiving section and a purified water discharge section. The raw water supply part has a raw water supply port, a connecting male screw, and a ring-shaped seal member, and the raw water receiving part has a circular raw water receiving inlet and a connecting female screw. The connecting male screw and the connecting female screw are double-threaded screws, and the purified water discharge part is provided at a position different from the raw water receiving part.

  Here, it is preferable that the outer diameter of the seal member is smaller than the outer diameter of the connecting male screw.

  It is also preferable to have a seal member mounting groove in the raw water supply section.

  A cartridge for a water purifier equipped with a raw water receiving portion, the raw water receiving portion has a circular raw water receiving port and a female screw for connecting a double thread, and the purified water discharge portion is provided at a position different from the raw water receiving portion. A water purifier cartridge is also preferred.

  According to the present invention, a water purifier main body provided with a raw water supply section, a water purifier connected to the water purifier main body and comprising a water purifier cartridge provided with a raw water receiving section and a purified water discharge section, the raw water supply section is The raw water supply port, the connecting male screw, and the ring-shaped seal member, and the raw water receiving part has the circular raw water receiving port and the connecting female screw, the connecting male screw and the connecting female screw Since the screw is a double thread and the water purification discharge part is a water purifier provided at a position different from the raw water receiving part, there is no additional one member for attaching / detaching the water purifier cartridge to the water purifier body, and the manufacturing cost is increased. Absent. Since it is a double thread screw, it can be firmly fixed without turning the water purifier cartridge 2-3 times. Since the purified water discharge part is provided outside the screw, the screw diameter is small and the rotational resistance is not large. When purchasing spare parts for water purifier cartridges, the type of cartridge in use can be confirmed. Even if it hits a frying pan and rotates 90 degrees, it will not fall out, and it will not break even if it is used for a long time in an area where water pressure is particularly high.

  If the outer diameter of the seal member is smaller than the outer diameter of the connecting male screw, the rotational resistance when the water purifier cartridge is mounted is small and easy to rotate.

  If the raw water supply section has a seal member mounting groove, there is no concern that the seal member will drop off when the water purifier cartridge is attached or detached.

  A cartridge for a water purifier equipped with a raw water receiving portion, the raw water receiving portion has a circular raw water receiving port and a female screw for connecting a double thread, and the purified water discharge portion is provided at a position different from the raw water receiving portion. Since this is a cartridge for water purifier, the number of members is not increased to attach and detach the cartridge for water purifier to the main body for water purifier, and the manufacturing cost does not increase. Since it is a double thread screw, it can be firmly fixed without turning the water purifier cartridge 2-3 times. Since the purified water discharge part is provided at a position different from the screw, the screw diameter is small and the rotational resistance is not large. When purchasing spare parts for water purifier cartridges, the type of cartridge in use can be confirmed. Even if it hits a frying pan and rotates 90 degrees, it will not fall out, and it will not be damaged even if it is used for a long time in an area where water pressure is particularly high.

It is a longitudinal cross-sectional view which shows an example of the water purifier in this invention. It is a longitudinal cross-sectional view which shows an example of the main body for water purifiers in this invention. It is a left view which shows an example of the main body for water purifiers in this invention. It is a longitudinal cross-sectional view which shows an example of the cartridge for water purifiers in this invention.

  One embodiment of the water purifier in the present invention will be described with reference to the drawings.

  FIG. 1 is a longitudinal sectional view showing an example of a water purifier in the present invention, and FIG. 2 is a longitudinal sectional view showing only a main body for a water purifier. As shown in FIG. 1, the water purifier 1 includes a water purifier main body 2 having a switching valve built therein and a water purifier cartridge 3 in which a filter medium is accommodated. The water purifier main body 2 is provided with a lever-11, and by operating the lever-11, tap water (raw water) flowing in from the tap tap 4 is discharged as shower water as it is (raw water shower) or as it is. -Whether the water is discharged as raw water (raw water straight) or supplied to the water purifier cartridge 3 is selected and switched. The raw water supplied to the water purifier cartridge 3 is filtered by an adsorbent such as activated carbon and a hollow fiber membrane, and discharged from the purified water discharge port as purified water.

  A ring-shaped packing 13 is attached to the switching valve body 12 provided in the water purifier body 2, and a mounting nut 15 is screwed into the switching valve body 12 via an adapter 14 screwed into the male thread portion of the water tap 4. Thus, the water purifier main body 2 is attached to the water tap 4.

  As shown in FIG. 2, the inside of the switching valve main body 12 is divided into an upper chamber 18 and a lower chamber 19 by a partition plate 17 having three water passages 16a, 16b, and 16c. In the upper chamber 18, three balls (valves) 20a, 20b, 20c are arranged so as to correspond to the three water passages 16a, 16b, 16c. The lower end of the ball 20a protrudes into the lower chamber 19 in a state where the ball 20a is fitted in the water passage 16a and the water passage 16a is closed. The same applies to the balls 16b and 16c. In the cylindrical lower chamber 19, a valve shaft 21 is rotatably inserted, and O-rings 22 a, 22 b, 22 c disposed at predetermined positions of the valve shaft 21 are watertight with the inner wall surface of the lower chamber 19. Is engaged. Thus, the lower chamber 19 is divided into three, a flow path 24a leading from the water flow path 16a to the raw water supply port 23 for supplying tap water to the water purifier cartridge 3, and a flow path leading from the water flow path 16b to the raw water straight port. 24 b and a flow path 24 c that leads from the water flow path 16 c to the raw water shower port 25 are formed. The valve shaft 21 is provided with cam portions 26a, 26b, and 26c at positions facing the water passages 16a, 16b, and 16c. These cam portions 26a, 26b, and 26c can be selectively turned upward by rotating the valve shaft 21 by 90 °, for example, and push up the lower end portion of the ball protruding into the lower chamber 19 to open the water passage. It can be done. That is, by rotating the valve shaft 21 by a predetermined angle, one of the water passages 16a, 16b, 16c is opened, and the raw water flowing in from the water tap 4 is discharged as shower water as it is, or straight water as it is. Can be discharged or supplied to the water purifier cartridge 3.

  A cylindrical raw water supply unit 27 that supplies raw water to the water purifier cartridge 3 is provided on the side of the water purifier main body 2. The raw water supply unit 27 and the raw water receiving unit 32 of the water purifier cartridge 3 are configured to be detachable by a screw mechanism. Details of the raw water supply unit 27 will be described later.

  Next, the water purifier cartridge 3 will be described. The water purifier cartridge 3 is provided with a circular hole-shaped raw water receiving portion 32 at the side of the container 31. Details of the raw water receiving unit 32 will be described later. A purified water discharge port (purified water discharge portion) 33 as a shower hole for filtering the raw water and discharging it as purified water is provided at the lower part of the container 31.

  A cylindrical projection 31a formed on the inner bottom surface of the container 31 has a lower end of a cylindrical case 34 fitted and erected via an O-ring 35. The upper and lower outer peripheral surfaces of the cylindrical case 34 are ring-shaped filters 36 and 37. 31 is fixed to the inner wall surface. Inside the cylindrical case 34, a hollow fiber membrane bundle 38 in which a plurality of hollow fiber membranes are bundled and folded and stored in an inverted U shape is disposed. Both ends of the hollow fiber membrane are sealed and fixed by mixing and filling a gap between the hollow fibers at the lower part of the cylindrical case 34 and a two-component curable resin 39 as a sealing agent between the hollow fiber and the cylindrical case 34. (Potting). Since the potting portion is partially cut and removed before fitting into the container 31, the end of each hollow fiber opens toward the purified water discharge port 33. An adsorbent 40 made of activated carbon, zeolite, ion exchange resin, chelate resin or the like is disposed between the cylindrical case 34 and the inner wall surface of the container 31. Moreover, the upper part of the container 31 is opened so that the hollow fiber membrane bundle 38 and the adsorbent 40 can be easily filled, and a transparent cap 41 is fitted so that the hollow fiber can be clearly seen from the outside. Further, a lid 42 is provided on the upper portion of the transparent cap 41 so as to be detachable from the container 31.

  Next, the raw | natural water supply part 27 of the main body 2 for water purifiers is demonstrated. FIG. 3 is a left side view showing an example of a water purifier main body in the present invention.

  The raw water supply unit 27 has a cylindrical shape, and a raw water supply port 23 is disposed inside the raw water supply unit 27. The connecting male screw 72 is provided. Since the O-ring 71 is mounted in the O-ring groove (seal member mounting groove) 73, it does not come off and drop off even when the water purifier cartridge is attached or detached, or when the water purifier cartridge is not connected. Since the outer diameter of the O-ring 71 is smaller than the root diameter of the connecting male screw 72, the surface of the O-ring is not damaged when the connecting male screw 72 is screwed into the connecting female screw 81. Since the O-ring 71 has a sufficiently small diameter, the rotational resistance is small, and it does not become a burden when connecting the water purifier cartridge. For the O-ring 71, silicone rubber, ethylene propylene rubber, nitrile rubber or the like is used. A rubber having a JIS A hardness of 30 to 80 degrees is used, but 45 to 60 degrees is preferable in consideration of pressure resistance and a load on the resin member.

  The connecting male screw 72 is a metric screw double thread. The pitch of the screw is 1 to 5 mm, and preferably 1.5 to 3 mm. As the type of screw, any of a unified screw, a wit screw, and a trapezoidal screw may be used. Since the O-ring 71 is disposed at the tip of the connecting male screw 72, the connecting male screw 72 does not get wet when water passes.

  Next, the raw water receiving part 32 of the water purifier cartridge 3 will be described. FIG. 4 is a right side view showing an example of a water purifier cartridge according to the present invention.

  The raw water receiving portion 32 has a circular hole shape, and a raw water receiving port 43 is disposed inside the raw water receiving portion 32, and a connecting female screw 81 to which the aforementioned connecting male screw 72 can be screwed is provided on the inner periphery of the circular hole shape. Is provided. The raw water receiving port 43 has a circular hole shape coaxial with the raw water receiving portion, and has a smaller diameter than the inner diameter of the connecting female screw 81 and an inner diameter at which the O-ring 71 is appropriately crushed.

  The connecting female screw 81 is a double thread of a metric screw. The pitch of the screw is 1 to 5 mm, and preferably 1.5 to 3 mm. As the type of screw, any of a unified screw, a wit screw, and a trapezoidal screw may be used. The connecting male screw 72 and the connecting female screw 81 start to be screwed with the water purifier cartridge 3 standing upright with respect to the water purifier main body 2, and the fastening is completed when the connecting male screw 72 is rotated once in the clockwise direction. The angle is set to do. The connecting male screw 72 and the connecting female screw 81 are hooked by two pitches, and can be used for a long time in areas where water pressure is particularly high by appropriately selecting tap water pressure, channel diameter, screw pitch, and screw material. However, a design that does not break is possible.

  In the water purifier 1 having the above configuration, a method for connecting the water purifier cartridge 3 to the water purifier main body 2 will be described. As a first step, the water purifier cartridge 3 is erected, and the raw water receiving portion 32 is inserted into the raw water supply portion 27 of the water purifier main body 2.

  When the water purifier cartridge 3 is slightly rotated clockwise as the second step, the connecting male screw 72 provided in the raw water supply unit 27 starts to be applied to the connecting female screw 81 provided in the raw water receiving unit 32. If it continues and rotates 360 degree | times once, fastening of the connection external thread 72 and the internal connection thread 81 will be completed, and it will stop in the state in which the cartridge 3 for water purifiers stood upright.

  Since the water purifier cartridge is attached to and detached from the water purifier main body, one member is not added, and the manufacturing cost does not increase. Since it is a double thread screw, the water purifier cartridge can be securely fixed in one rotation. Since the purified water discharge part is provided at a position different from the raw water receiving part, the screw diameter is small and the rotational resistance is not large. Even if you hit a frying pan and turn 90 degrees, it will not fall out. It will not break even if it is used for a long time in areas with particularly high water pressure. Since the water purifier cartridge can be seen from the outside, the type of cartridge in use can be confirmed even when purchasing spare parts.

  When the water tap is opened with the flow path switching valve in the purified state, the tap water flows into the water purifier cartridge 3 and first comes into contact with the adsorbent 40 to decompose free residual chlorine in the tap water, and at the same time volatilizes in the tap water. Organic matter is adsorbed and removed. Next, the water reaches the hollow fiber membrane bundle 38 inside the adsorbent 40. Water flows from the outer diameter side to the inner diameter side of the hollow fiber membrane, and turbidity and bacteria in the water are captured by the hollow fiber membrane. The purified water that has passed through the hollow fiber membrane is discharged from a purified water discharge port (purified water discharge portion) 33 as a shower hole. The user can obtain delicious and safe purified water.

  In the above-described embodiment, the raw water supply unit has a connecting male screw, the raw water receiving unit has a connecting female screw, and the connecting male screw and the connecting female screw are double-threaded. It is also possible to have a female screw for connection in the portion, a male screw for connection in the raw water receiving portion, and the male screw for connection and the female screw for connection are double threaded.

<Example 1>
An O-ring S9 was attached to the outer peripheral tip of the cylindrical raw water supply unit of the water purifier main body, and a metric screw M18, a pitch of 2 mm, and two connecting male screws were provided on the outer peripheral back side. On the inner periphery of the circular hole-shaped raw water receiving portion 43 of the water purifier cartridge, a metric screw M18, a pitch of 2 mm, and two connecting female screws were provided.

The state which connected the cartridge for water purifiers to the main body for water purifiers is demonstrated. As a first step, the water purifier cartridge was erected, and the raw water receiving portion was inserted into the raw water supply portion of the water purifier main body. As a second step, when the water purifier cartridge was slightly rotated clockwise and then rotated once by 360 degrees, the water purifier cartridge was stopped in an upright state. The rotational resistance was as light as 0.5 Nm. The water purifier cartridge was successfully connected to the water purifier body.
<Comparative Example 1>
A Y-packing nominal 46 was attached to the tip of the outer cylinder of the double cylindrical raw water supply section of the water purifier main body, and a trapezoidal screw nominal 52, a pitch of 2 mm, and a single connection male screw were provided on the inner side of the outer cylinder. A trapezoidal screw nominal 52, a pitch of 2 mm, a single connecting female screw was provided on the inner periphery of the double cylindrical raw water receiving portion of the water purifier cartridge, and an O-ring S11 was provided on the outer periphery of the inner cylinder.

  The state which connected the cartridge for water purifiers to the main body for water purifiers is demonstrated. As a first step, the water purifier cartridge was leveled and the raw water receiving portion was inserted into the raw water supply portion of the water purifier main body. As the second step, when the water purifier cartridge was slightly rotated clockwise and then continuously rotated three times, the rotation of the water purifier cartridge was stopped. Although the water purifier cartridge could be normally connected to the water purifier main body, the rotational resistance was as heavy as 0.11 Nm.

  The present invention can be applied to general water purifiers such as a faucet direct-coupled water purifier, a stationary water purifier, and an undersink water purifier, but is not limited thereto.

DESCRIPTION OF SYMBOLS 1 Water purifier 2 Water purifier main body 3 Water purifier cartridge 4 Water faucet 11 Lever 12 Switching valve main body 13 Packing 14 Adapter 15 Mounting nut 16a Water passage 16b Water passage 16c Water passage 17 Partition plate 18 Upper chamber 19 Lower chamber 20a Ball 20b Ball 20c Ball 21 Valve shaft 22a O-ring 22b O-ring 22c O-ring 23 Raw water supply port 24a Channel 24b Channel 24c Channel 25 Raw water shower port 26a Cam portion 26b Cam portion 26c Cam portion 27 Raw water supply portion 31 Container 31a Cylindrical protrusion 32 Raw water receiving part 33 Shower hole (purified water discharge part)
34 Cylindrical case 35 O-ring 36 Filter 37 Filter 38 Hollow fiber membrane bundle 39 Two-component curable resin 40 Adsorbent 41 Transparent cap 42 Lid 43 Raw water receiving port 71 O-ring 72 Male thread for connection 73 O-ring groove 81 Female thread for connection

Claims (4)

  A water purifier main body with a raw water supply section, a water purifier connected to the water purifier main body and comprising a water purifier cartridge with a raw water receiving section and a purified water discharge section, wherein the raw water supply section has a raw water supply port, It has a male screw for connection and a ring-shaped seal member. The raw water receiving part has a raw water inlet for a circular hole and a female screw for connection. The male screw for connection and the female screw for connection are double threaded. The water purifier is provided at a position different from the raw water receiving unit.   The water purifier according to claim 1, wherein the outer diameter of the sealing member is smaller than the outer diameter of the connecting male screw.   The water purifier according to claim 2, wherein the raw water supply unit has a seal member mounting groove.   A cartridge for a water purifier equipped with a raw water receiving portion, the raw water receiving portion has a circular raw water receiving port and a female screw for connecting a double thread, and the purified water discharge portion is provided at a position different from the raw water receiving portion. The cartridge for water purifiers characterized by being made.

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